If it's an MV build you're playing then you can't really fix it. You may want try to restart the game every now and then and save before every action you want to make, but I doubt that will be helpful in the long run.Guys my game sometimes have something like syntax error or anything like that. Example when i give the Priest milk potion its say sybtax error. How do u fix this?
The best option is to get your hands on the VX Ace 0.50 version of the game in the OP; it's less buggy, has more scenes, more content and stuff. All in all, it's a lot less painful to play than the MV.
As far as I can tell, MV versions serve as a tecnobrake's showcase of porting content progress to the new engine. That's pretty much it.